Isothermal Austenite–Ferrite Phase Transformations and Microstructural Evolution during Annealing in Super Duplex Stainless Steels
Super Duplex Stainless Steels (SDSSs) are composed of α-ferrite and γ-austenite grains, the simultaneous presence of which forms an optimal microstructure to achieve the best combination of mechanical and corrosion resistance properties. Moreover, international quality standards are strict about the...
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MDPI AG
2017-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/7/9/368 |
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| author | Andrea Francesco Ciuffini Silvia Barella Cosmo Di Cecca Andrea Gruttadauria Carlo Mapelli Davide Mombelli |
| author_facet | Andrea Francesco Ciuffini Silvia Barella Cosmo Di Cecca Andrea Gruttadauria Carlo Mapelli Davide Mombelli |
| author_sort | Andrea Francesco Ciuffini |
| collection | DOAJ |
| description | Super Duplex Stainless Steels (SDSSs) are composed of α-ferrite and γ-austenite grains, the simultaneous presence of which forms an optimal microstructure to achieve the best combination of mechanical and corrosion resistance properties. Moreover, international quality standards are strict about the phase fraction ratio. The purpose of this work is the achievement of a better description of the phase ratio evolution taking place during annealing at 1080 °C in the super duplex stainless steels F53–S32750 and F55–S32760. The experimental results show a damped sinusoidal trend in the α/γ phase ratio evolution with the increase of the soaking time of thermal treatment. This can be described by coupling both the competitive coarsening growth regime and the concept of the local equilibrium phase transformations, pointing out a good correspondence with the experimental data. Further, recrystallization phenomena also play a major role. Finally, the additivity character of the observed processes has been proven. |
| first_indexed | 2024-04-14T04:55:18Z |
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| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-04-14T04:55:18Z |
| publishDate | 2017-09-01 |
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| series | Metals |
| spelling | doaj.art-d0bec9cc87b04ee1ba75b63a84056dce2022-12-22T02:11:10ZengMDPI AGMetals2075-47012017-09-017936810.3390/met7090368met7090368Isothermal Austenite–Ferrite Phase Transformations and Microstructural Evolution during Annealing in Super Duplex Stainless SteelsAndrea Francesco Ciuffini0Silvia Barella1Cosmo Di Cecca2Andrea Gruttadauria3Carlo Mapelli4Davide Mombelli5Department of Mechanical Engineering, Politecnico di Milano, via La Masa 34, 20156 Milano, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, via La Masa 34, 20156 Milano, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, via La Masa 34, 20156 Milano, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, via La Masa 34, 20156 Milano, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, via La Masa 34, 20156 Milano, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, via La Masa 34, 20156 Milano, ItalySuper Duplex Stainless Steels (SDSSs) are composed of α-ferrite and γ-austenite grains, the simultaneous presence of which forms an optimal microstructure to achieve the best combination of mechanical and corrosion resistance properties. Moreover, international quality standards are strict about the phase fraction ratio. The purpose of this work is the achievement of a better description of the phase ratio evolution taking place during annealing at 1080 °C in the super duplex stainless steels F53–S32750 and F55–S32760. The experimental results show a damped sinusoidal trend in the α/γ phase ratio evolution with the increase of the soaking time of thermal treatment. This can be described by coupling both the competitive coarsening growth regime and the concept of the local equilibrium phase transformations, pointing out a good correspondence with the experimental data. Further, recrystallization phenomena also play a major role. Finally, the additivity character of the observed processes has been proven.https://www.mdpi.com/2075-4701/7/9/368duplex stainless steelisothermal austenite–ferrite transformationmulticomponent diffusionlocal equilibriumadditivity rule |
| spellingShingle | Andrea Francesco Ciuffini Silvia Barella Cosmo Di Cecca Andrea Gruttadauria Carlo Mapelli Davide Mombelli Isothermal Austenite–Ferrite Phase Transformations and Microstructural Evolution during Annealing in Super Duplex Stainless Steels Metals duplex stainless steel isothermal austenite–ferrite transformation multicomponent diffusion local equilibrium additivity rule |
| title | Isothermal Austenite–Ferrite Phase Transformations and Microstructural Evolution during Annealing in Super Duplex Stainless Steels |
| title_full | Isothermal Austenite–Ferrite Phase Transformations and Microstructural Evolution during Annealing in Super Duplex Stainless Steels |
| title_fullStr | Isothermal Austenite–Ferrite Phase Transformations and Microstructural Evolution during Annealing in Super Duplex Stainless Steels |
| title_full_unstemmed | Isothermal Austenite–Ferrite Phase Transformations and Microstructural Evolution during Annealing in Super Duplex Stainless Steels |
| title_short | Isothermal Austenite–Ferrite Phase Transformations and Microstructural Evolution during Annealing in Super Duplex Stainless Steels |
| title_sort | isothermal austenite ferrite phase transformations and microstructural evolution during annealing in super duplex stainless steels |
| topic | duplex stainless steel isothermal austenite–ferrite transformation multicomponent diffusion local equilibrium additivity rule |
| url | https://www.mdpi.com/2075-4701/7/9/368 |
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